Floor Plan Scale Calculator: Convert a Venue Drawing to Real Size
Pick the scale on the venue's drawing and convert what you measure on the print to real feet and meters, or back. No scale, or printed at a different size? Measure one dimension you know and the calculator works out the scale, then sizes common booths and aisles at it.
Convert a Floor Plan Measurement
30 ft
Real length
9.14 m. 3.75 in on the drawing at 1/8 in = 1 ft (1:96).
12 1/2 in
100 ft on the drawing
31.8 cm, or 317.5 mm.
8 ft
1 inch on the drawing
1 cm on the drawing is 0.96 m.
The formula
Ratio = 12 ÷ inches per foot (1/8 in = 1 ft is 1:96).
Real length = drawing length × ratio.
Printed at a different size: ratio ÷ print percentage.
Trace the venue drawing at this scale in event floor plan software instead of measuring by hand.
Booths and Aisles at This Scale
How big common booth sizes and aisle widths are on the drawing at 1/8 in = 1 ft (1:96). Inches are to the nearest 1/16. These are sizes to convert, not requirements.
| Size | Real size | On the drawing (in) | On the drawing (cm) |
|---|---|---|---|
| 10x10 booth | 10 x 10 ft (3.05 x 3.05 m) | 1 1/4 x 1 1/4 in | 3.2 x 3.2 cm |
| 10x20 booth | 10 x 20 ft (3.05 x 6.1 m) | 1 1/4 x 2 1/2 in | 3.2 x 6.4 cm |
| 20x20 island | 20 x 20 ft (6.1 x 6.1 m) | 2 1/2 x 2 1/2 in | 6.4 x 6.4 cm |
| 8 ft aisle | 8 ft (2.44 m) | 1 in wide | 2.5 cm wide |
| 10 ft aisle | 10 ft (3.05 m) | 1 1/4 in wide | 3.2 cm wide |
Find an Unknown Scale
Measure one thing whose real size you know, such as a dimensioned wall or a booth the venue lists. The longer it is, the more accurate the scale.
1:192
Scale of this print
1/16 in = 1 ft. 1 in on the print is 16 ft; 1 cm is 1.92 m.
That is the standard 1/16 in = 1 ft (1:192) scale.
This sheet is printed at about 50% of its original size, so read it at 1:192, not 1/8 in = 1 ft (1:96).
Conversion only. Confirm dimensions with the venue before you sell booths, and have the fire marshal approve aisle widths and exits.
How to Scale a Floor Plan
1. Find the scale on the drawing
Look in the title block or beside the scale bar. Architectural drawings give inches per foot, such as 1/8″ = 1′-0″; metric drawings give a ratio, such as 1:100.
2. Check the print size
The written scale only holds at the original sheet size. A sheet reduced to fit smaller paper shrinks the scale with it, so measure one known dimension to confirm it before you trust it.
3. Measure and multiply
Measure on the print and multiply by the scale ratio to get the real length, or divide a real length by the ratio to see how long to draw it.
4. Lay out booths and aisles
Use the booth and aisle table to mark spaces on the print. Pick sizes with our guide to trade show booth sizes and trade show aisle widths, then count how many fit with the booth capacity calculator.
5. Get the layout approved
Send the scaled plan to the venue and the fire marshal before you sell booths. See what fire marshals look for in a floor plan.
Standard Floor Plan Scales
What one inch and one centimeter on the print stand for at each common scale, and how long a 10 ft booth side is on the drawing.
| Scale | Ratio | 1 in on print | 1 cm on print | 10 ft booth |
|---|---|---|---|---|
| 1/16 in = 1 ft (1:192) | 1:192 | 16 ft | 1.92 m | 5/8 in (15.9 mm) |
| 1/8 in = 1 ft (1:96) | 1:96 | 8 ft | 0.96 m | 1 1/4 in (31.8 mm) |
| 3/16 in = 1 ft (1:64) | 1:64 | 5 ft 4 in | 0.64 m | 1 7/8 in (47.6 mm) |
| 1/4 in = 1 ft (1:48) | 1:48 | 4 ft | 0.48 m | 2 1/2 in (63.5 mm) |
| 1/2 in = 1 ft (1:24) | 1:24 | 2 ft | 0.24 m | 5 in (127 mm) |
| 1:50 | 1:50 | 4 ft 2 in | 0.5 m | about 2 3/8 in (61 mm) |
| 1:100 | 1:100 | 8 ft 4 in | 1 m | about 1 3/16 in (30.5 mm) |
| 1:200 | 1:200 | 16 ft 8 in | 2 m | about 5/8 in (15.2 mm) |
| 1:500 | 1:500 | 41 ft 8 in | 5 m | about 1/4 in (6.1 mm) |
Draw Your Floor Plan to Scale in Map D
With Map D’s event floor plan software you upload an image of the venue floor plan (PNG or JPG work best), then calibrate the scale by clicking two points whose real distance you know, such as the ends of a wall, and lock the map scale so it isn’t changed by accident. Choose imperial or metric units and draw booths, aisles and areas over the plan. A free floor plan account gives you the map editor for one event, including setting the scale and adding a background image; publishing the floor plan needs a paid plan, from $1,500 per event.
What this assumes
Every figure the calculator starts with, and where it comes from. Where the honest answer is that a number depends on your venue, it says so rather than inventing one.
- Standard scales
- Architectural scales give inches on paper per foot of room, so the ratio is 12 divided by that fraction: 1/16 in = 1 ft is 1:192, 1/8 in is 1:96, 3/16 in is 1:64, 1/4 in is 1:48 and 1/2 in is 1:24. Metric scales are ratios already. These are definitions, not estimates.
- Unit conversions
- 1 inch is exactly 25.4 mm and 1 foot exactly 0.3048 m, so a drawing in inches can be read in meters and a metric drawing in feet.
- Print size
- A drawing printed at a percentage of its original sheet size changes scale by the same factor: divide the ratio by the percentage. A 22 x 34 in sheet printed on 11 x 17 in paper is at 50%. The default is 100%, printed at original size.
- Matching a standard scale
- A scale worked out from a known dimension is reported as a standard scale when it is within 2% of one, which allows for a ruler read to the nearest 1/16 in. Measure the longest dimension you know, such as a whole wall or a row of booths, to keep the error small.
- Rounding
- Drawing lengths in inches are rounded to the nearest 1/16 in, the finest mark on most rulers, and real lengths to the nearest inch or centimeter.
- Booth and aisle examples
- The quick table converts 10x10, 10x20 and 20x20 booths and 8 ft and 10 ft aisles because they are common sizes to lay out. They are examples to convert, not requirements: the venue and the fire marshal set your aisle widths.
What it does not model
- Drawings marked NTS (not to scale), sketches and marketing maps. Ask the venue for a dimensioned CAD or PDF drawing instead.
- Measuring on screen. A PDF viewer's zoom changes what a ruler on the screen reads; measure a known dimension at the same zoom, or use the viewer's own measuring tool once its scale is set.
- Paper that has stretched, been copied at an unknown size or scanned at an angle. Check the scale in two directions.
- Whether the drawing is current. Columns, doors, rigging points and utility locations change; confirm them with the venue before you sell booths.
- Aisle widths, exits and egress, which your fire marshal and venue approve. This calculator converts sizes; it does not check code.
Estimate only, from the figures you entered. Not a quote. Last reviewed November 2026.
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Frequently asked questions
How do I convert 1/8 inch scale to feet?
Each 1/8 inch on the drawing is 1 foot in the room, so 1 inch is 8 feet. Multiply a measurement in inches by 8 to get feet: 3 3/4 in is 30 ft. Going the other way, divide feet by 8 to get inches on the drawing: a 10 ft booth is 1 1/4 in.
What does a 1:100 scale mean on a floor plan?
1:100 means one unit on the drawing is 100 of the same unit in the room, so 1 cm is 100 cm, or 1 m, and 1 mm is 10 cm. At 1:200, 1 cm is 2 m; at 1:50, 1 cm is 50 cm. A 3 m booth is 3 cm on a 1:100 drawing.
How do I find the scale of a floor plan without a scale bar?
Find something on the drawing whose real size you know, such as a dimensioned wall, a door or a booth the venue lists, measure it on the print and divide the real length by the measured length in the same unit. A 10 ft booth that measures 5/8 in gives 120 in ÷ 0.625 in = 1:192, which is 1/16 in = 1 ft. Measure the longest known dimension you can to keep the error small.
What if the floor plan was printed at a different size?
Divide the scale ratio by the print percentage. A 1/8 in = 1 ft (1:96) drawing on a 22 x 34 in sheet printed on 11 x 17 in paper is at 50%, so it reads at 1:192, or 1/16 in = 1 ft. If you don't know the print size, measure a known dimension and work the scale out from that instead; a scale bar printed on the sheet shrinks with the drawing and stays correct.
Can Map D draw a floor plan to scale from the venue drawing?
Yes. In Map D's map editor you upload an image of the venue floor plan (PNG or JPG work best), then calibrate the scale by clicking two points whose real distance you know, such as the ends of a wall, and lock the map scale so it isn't changed by accident. You can choose imperial or metric units. A free account gives you the map editor for one event, including setting the scale and adding a background image; publishing the floor plan needs a paid plan from $1,500 per event.
Sources
- Map D event diagramming software: start from the venue drawing and set the scale · checked 2026-11-04
- Map D help center: the free plan and how to upgrade · checked 2026-11-04
- Map D pricing · checked 2026-09-18